3.3 Krystyna investigated how a person's pulse rate changes when they exercise. She tested four of her friends. Belinda and Jasmina do a lot of sport. Jade and Mara prefer to read books and play computer games.
Krystyna measured the four girls' pulse rate, in beats per minute, when they were relaxing. Then she asked them to run up two flights of stairs, and measured their pulse rate again. There are her results.
Belinda 65, 102
Jasmina 72, 105
Jade 70, 110
Mara 74, 120
a Draw a result table, and fill in Krystyna's results. Remember to label the rows and columns of your results table fully.
b Display Krystyna's results in the way you think is best.
c Write down one conclusion that Krystyna can make from her results.
d Krystyna decided that she did not have enough evidence to decide whether being fit affects a person's pulse rate. Was she right? Explain your answer.